Ventilating device.



PATENTED JULY 16, 1907.

L. S. GRAEBING. VBNTILATING DEVICE.

APPLICATION FILED APR. 6, 1907.

INVENTOR WITNESSES ,afM /x) I 32% (6 PATENT OFFICE.

LAWRENCE S. GRAEBING, OF YONKERS PARK, NEW YORK.

VENTILATING- DEVICE.

Specification of Letters Patent.

Patented July 16, 1907.

Application filed April 6, 1907. Serial No. 366,658-

To all whom it may concern:

Be it known that I, LAWRENCE S. GRAEBING, a citizen of the UnitedStates, and a residentof Yonkers Park,

- to the inclosed space;

, This object may be furthered by providing a hooded ventilatingaperture with an automatic dust discharg-.

ing. valve for permitting and then checking the flow of airlongitudinally through the open ended hood and thendefiecting the airthrough a ventilating aperture.

" The above and further objects will be apparent from the'followingdescription.

- A preferred embodiment of the invention is shown in the accompanyingdrawings which form a part of this specification and in which,

Figure].- is an inside elevationshowing the application of the inventionto a window frame; Fig. 2 is a horizontal section taken through 22 ofFig. 3; Fig. 3 is a vertical section taken through 33 of Fig. 2; and

Fig. 4;is an enlarged detail section through 4-4 of Fig. 1.,

Referring now more particularly to the drawings, 1 designates abackplate which forms a partition section separating some inclosed spacesuch as a room or car interior from the outside atmosphere. back plate 1may be a permanent partition, may be a part of thewindow itself or maybe a removable and replaceable part such as that indicated. Forconvenience in removing and replacing the back plate 1, itis providedwith a slidable section 2 which is secured to the base plate 1 by meansof a tongue and groove 3, 4,

onev formed on the back plate and the other formed along the abuttingedge of the section 2. The tongue and groove jointure should be inclinedto the length of the back plate, as shown, so that by sliding thesection 2 upwardly along the tongue3, the effective length of thebackplate or section 2 will be shortened to permit its ready removalfrom the window frame 5.

The back plate 1 is illustrated as being provided with two completeventilating devices 6 and 7 between whichthere is located a small windowpane 8. For

. each of the devices 6 and7 the back plate 1 is provided I with-twoventilating apertures 9 and 10. In'the present embodiment theseapertures are provided by a con tinu'ousslot throughthe back plate lwhi'ch is divided into two apertures 9 and 10,by a valve device 11, theaxis of which is the demarcation between the apertures.

Obviously, the.

When in operation either one or the other of the apertures 9 and 10serves alone as the intake ventilating aperture and, of course, for somepurposes, a ventilating device provided merely with one of the apertureseither 9 01 10 would be serviceable, in this case air being forcedthrough this single aperture only when the outside air current is of agiven direction. Secured to the back plate 1 in a horizontal position soas to cover the apertures 9 and 10 is a rectangular hood 12 providedwith open ends 13 and 14 but closed on the other three sides, as shown.The open ends 13 and 14 are preferbly provided with suitable screens 15and 16 to prevent the entrance of foreign matter. The valve device 11preferably comprises two plates 17 and 18 secured one to the other andangularly disposed to form an L-shaped member, as shown, or if theangular opening between the two plates is varied as it may be, themember would assume either aV-shapcd cross section or one in which theangular section was obtuse. Secured to the edges oi the plates 17 and 18is a suitable packing 19 which may be felt or other yielding materialcapable of cushioning the impact of the plates 17 and 18 and of making abetter air-tight closure. The plates 17 and 18 are secured one to theother, as shown, along their meeting edges and at this angular edge areprovided at top and bottom with suitable pivots 20 and 21 which work insockets 22 and 23 formed at the top and bottom of the hood 1-2 so thatthe axis, about which the valve device 11 swings, extends verticallysubstantially across the face of the back plate 1 and the ventilatingapertures 9 and 10 are substantially symmetrically arranged on oppositesides of this axis. Each of the plates 17 and 18 is substantiallyidentical with the other and they are respectively of a size sufiicientto cover the apertures 9 and 10 and also to form a closing partitionacross the middle of the hood 12.

On the interior face of the back plate 1 there is provided a suitableair current deflector 24. A screen 25 is preferably provided for thisdeflector. The member 26 is a combined extension and cover for thedeflector 24 and is hinged thereto by hinges 27. The side edges of themember 26 are provided with projecting wings 28 which are designed topass down adjacent to the side members 29 and 30 of the deflector 24either through the openings 31 and 32 between the screen 25 and thesides 29 and 30 or outside of the side members 29 and 30. Sulficientfriction may be provided in the hinge 27 and the sliding engagement ofthe wings 28 with the sides'29 and 30 so'that the member 26 will remainin any position into which it may be moved either completely coveringthe opening at the top of the deflector 24, partially closing the same,or leaving it completely open.

The arrows in Figs. 2 and 3 indicate the course of an air current whenthe ventilating device is operating in response to a steadv air movementtraveling in a direction transverse to the aperture'Q and substantiallyfrom leit to right. The plate 17 forms a partition across the middleportion of the hood lZ and deflects the air current which enters thehood at the end 13 through the aperture 9. It then passes up through thedeflector 24 into the inclosed space to be ventilated and obviously isimpelled by the'iorce of the air movement without the inclosed space.

It is well known that air currents outside of a building are frequentlychanging in direction and velocity and many times may be termed gusts ofwind. These gusts of wind carry with them accumulated dust and sometimeslarger particles of foreign matter. The screens 15 and 16 serve toprotect the entrance of much foreign matter but are not alone adequateto prevent the entranceoi dust.

Ii a sudden change in direction of the outside aircurrent occurs, airwill forcibly enter the right hand end 14 of the hood 12 carrying withita charge of dust; The plate 18 is closing the aperture 10 so that thisdust cannot enter the inclosed space. The air pressure acting upon theplate 17 immediately swings the entire valve device 11, comprising theplates 17 and 18, about its axis and there is a momentary sweep of airfrom end to end through the hood 12 which discharges the accumulateddust out the end 13. The plate 18 then forms a closing partition for thepassage of air from end to end through the hood 12 and deflects the aircurrent entering the end 14 through the ventilating aperture 10, leavingthe valve device 11 in the opposite position to that illustrated in Fig.2.

Obviously, the operation of the device in response to a second gust of adirection to enter the hood through the end 13 is similar to thatdescribed for end 14 and the valve device is then returned to theposition illustrated in the drawings.

Obviously, various changes in the valve device illustrated and in theinclosing hood may be made without departing irom the spirit of thisinvention and for some purposes, the valve device 11 may be used toadvantage without the inclosing hood.

I Furthermore, it is obvious that a single ventilating aperture 9 or 10might sometimes be of service and be advantageously provided with aclosing and deflecting plate or valve device 17 or 18 although it ispreferred to provide two ventilating apertures, as shown, and the valvedevice 11 comprising two plates 17 and 18.

Obviously, the deflector 24 may in some instances be dispensed with orbe replaced by another of suitable form.

What is claimed and what'isdesired to be secured by Letters Patentisz- 1. A ventilating device comprising a' partition section for aninclosed space. said partition section being provided with a ventilatingaperture; an open ended exterior hood covering said aperture; andautomatic means operable in response to gusts of wind-for permitting amomentary sweep of air through the hood and therebydls charging dustthrough the open ends of said hood and then for deflecting outside aircurrents through said aperture into the inclosed space until a change in'direction'of air'current occurs.

2. A ventilating device comprising -a back plate .pro-

vided with Ta ventilating aperture for an inclo'sed space;

an exterior hood secured to said back .plate to cover said aperture,said hood being closed on three s ides and open at its ends; and pivotedvalve means within said hood' operable by air movements first to permita flow of air" se ans 1 and a discharge of dust from end to end throughsaid hood and then to check the flow of air from end to end through saidhood and -to deflect the air through said ventilating aperture.

3 A ventilating device comprising a back plate provided with aventilating aperture; a. combined valve and air current deflectingdevice pivoted to cooperate with said ventilating aperture, said deviceoperable by an outside air current of one direction to close saidventilating aperture and operable by an outside air .current of the opposite direction to open said ventilating aperture and deflect the saidair current through said ventilating aperture.

4. A ventilating device'comprlsing a back plate provided with aperturesa combined valve device and deflector automatically operable by' aircurrents comprising two angular-1y disposed plates secured one to theother at their meeting edges; and means for pivoting said valve deviceto swing about an axis extending transversely between said aperturesand'substantially through the meeting edges of said plates, so that saidvalve device when swung in one direction will close one of saidapertures and deflect the air current into the other aperture and whenswung in the opposite direction will close the other of said aperturesand deflect the air current into the first aperture.

5. In a' ventilating device a back plate provided with plate and midwaybetween said apertures; said valve de vice comprising plates foralternately closing said apertures and for alternately deflectingatransverse air current into one or the other of said aperturesaccording to the direction of said air current.

Tl In a ventilating device a back plate provided with two ventilatingapertures; an automatic valve device pivoted to swing on a vertlcalaxisnear the face of said back plate and midway between said apertures; saidvalve device comprising plates for alternately closing said aper turesand foialternately deflecting a transverse air cur rent into one or theother of said apertures according to the direction of said air current;and an -open ended hood for covering said apertures and inclosing saidvalve device. i

8. A ventilating device comprising a back plate provided with twoadjacent ventilating apertures located substant ily symmetrically onopposite sides of a vertical axis near the face of said back plate; ahorizontal hood 7 secured to the face of said back plate and coveringsaid apertures but open at its ends an angular shaped yalve devicepivoted at its angularedge 'to swing about said axis and within saidhood in response -to yarylng air currents directed into the ends of saidhood, whereby an air current will be deflected through one aperture andwhereaperture. 1

9. A ventilating device comprising a back plate .proi vided with aventilating aperture; 21 pivotedvalve de vice at one face of said backplate 'for deflecting transverse air currents of one, direction throughsaid aperture and for closing said aperture in response to transverseair currents of the opposite direction; and an air current deflector forthe opposite face or said back plate.

10. A ventilating device comprising a back plate: provided with aventilating aperture; a pivoted valvedevi'ce 1 at one face of said backplate for deflecting transverse air currents of one direction throughsaid aperture and for closing said aperture in response to transverseair cur? rents of the opposite direction; an open ended. hood inclosingsaid valve device and covering =said aperture ;"9;nd

an'air current deflector for'the opposite face oi-siiiilfliack plate.

11. A ventilating device comprising a back plate provided with aventilating aperture; a pivoted valve device at one face of said backplate for deflecting transverse air currents "of one direction throughsaid aperture and for closing said aperture in response to transverseair -currents of the opposite direction; an open ended hood inclosingsaid valve device and covering said aperture; screens for the open endsof said hood; and an air cur rent deflector for the opposite face ofsaid back plate.

12. Aventilating device comprising a back plate pro- 'vided with'aventilating aperture; a pivoted valve device at one face of said backplate for deflecting transverse air currents of one direction throughsaid aperture and for closing said aperture in response to transverseair currents of the opposite direction; an open ended hood incl'osingsaid valve device and covering said aperture; screens for the open endsof said hood; an air current deflector for the opposite face of saidback plate; and a screen for said deflector.

in testimony whereof, I have signed my name to this specification; inthe presence of two subscribing witnesses.

LAWRENCL s. IRAEBING.

Witnesses:

IDA G. GILMORE, LEONARD DAY.

